Chaeles potticary



(No Model.)

O. POTTICABY SPABK ARRESTBR.

No. 430,298. Patentedune 17, 1890.

UNITED STATES PATENT OFFICE.

CHARLES POTTIOARY, OF ST. THOMAS, ONTARIO, CANADA.

SPARK-ARRESTER.

SPECIFICAION forming part of Letters Patent No. 430,298, dated June 17,1890.

Application filed November 4, 1889- Serial No. 329,189. (No modal.)Patented in Canada September 17, 1889, No. 32,315.

T0 all whom it may concern:

Be it known that I, CHARLES POTTIOARY, a citizen of the Dominion 01:Canada, residing at the city of St. Thomas, in the county of E1- gin andProvince of Ontario, Canada, have invented a ne w and usefulSpark-Arrester, of which the following is a specification.

The first part of my invention relates to improvements inspark-arresters in whioh an exhaust-pipe operates in conjunotion With arefleotor or damper; and the object of this part of my improvement is toarrest the sparks without interrupting the draft.

The second part of my invention relates to improvements inspark-arresters in which airpipes and steam-pipes operate in conjunctionWith return-flues; and the objeot of this part of my invention is toconvey the sparks and einders from the stack of a locomotive or otherengine to the fine-box.

In the accompanying drawings, Figure 1 is an interior view of a boi1er,showing the smoke-stack partly broken away, with my improvementsapp1ied; and Fig. 2 is a portion of a boiler With parts broken away,showing my invention.

Similar 1etters refer to similar parts throughout the several views.

A is a draft or smoke pipe.

B is the rin1 01 shell of a boiler.

D D are two concave perforated refiectors or dampers.

E is an exhanst-steam pipe.

F is a smoke-stack.

G is a pipe intended to reeeive air from the outside of the boiler.

I is a steam-pipe.

J J are air-funnels.

K K are steam-jets.

T T are retnrn-flues, whieh 1ead back to the fine-box.

I intend my invention to operate as follows: The sparks, einders, andsmoke after leaving the fines of the boiler Will pass through thedraft-pipe A and the stack F if the dampers D D are open; but when thedampers are revolved, so that the perforations therein are closed, thesparks, cinders, and smoke Will be drawn back to the firebox by thesuotion of the exhaust throngh the retnrn-flues T T. A supply of air isprovided by the funnels J J and conveyedtc the 1arger pipe G. The pipe Iis supplied With stearn from the boiler, which is forced into theretnrn-fines T T by the jets K K. The air-pipe G also oommnnicates Withthe return-flues T T by means of pipes inside of or surrounding the jetsK K. Thus the return-flnes are not fiable to become fou1 or ologgy, andthe air thus admitted to the firebox wil1 assist in the more perfectCombustion of the fuel.

What I claim as my invention, and desire to seoure by Letters Patent, is

1. The combination, in a spark-arrester, of the exhanst-pipe E andrevo1ving dampers or reflectors D D, ail substantially as set fo1th.

2. In a spark-arrester, the combination of the air-pipe G, thesteam-pipe I with the return-flues T, the exhaust-pipe E, and the re-Vo1ving dampers 01 refleotors D, substantially as specified.

CHARLES POTTIOARY.

Vitn esses:

A. MCCRIMMON, D. LONG.

